Not far from the M6 and the city of Birmingham is Cannock Chase in Staffordshire. The Go Ape centre is located in an Area of Outstanding Natural Beauty, known as Birches Valley.
This has one of their largest treetop adventures, with the longest zip wires being 260 metres.
Cannock Chase also has the Forest Segway, so if heights are not your thing, try one of these. (Note that age and weight restrictions apply – you need to be within a certain weight range for the segways to balance). Or of course, give the TreeTop Adventure a try.